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Recent Cold Weather (below 0°F) Sleeping Bag Reviews

Slumberjack Latitude -20°F

OK winter outer bag, as long as you know how to sleep and survive in cold weather. Too big for a standalone bag for me. I used this bag last winter in northern MN while leading dogsledding/skiing trips as an outer bag combined with an old 15 or 20 degree down inner (probably actually 20-25° now) and spent around 40 nights out in it, in temps ranging from -25°F to 30°F. Slept on two Therm-a-Rest RidgeRests under open tarps, in a mid, or in a doglsed. As others have noted, probably not wise to… Full review

Mountain Warehouse Everest Down Sleeping Bag

Bought specifically for Kilimanjaro (so generally expected dry weather). Did the job, but I won't be using it again as it didn't really survive washing afterwards (Kili is very dusty). Warmth: Never felt cold unlike some of my teammates. I did use it with an Exped inflatable mat, which I think made a big difference. Fit & Comfort: Pretty good, no scratchy bits. Found it most comfortable when worn with a base layer as has been mentioned it's not very breathable. Entry & Exit: ip is not very… Full review

Woods Canada Arctic 5 Star

The warmest sleeping bag on the market. I used this bag in Northern Saskatchewan while working in geology. The temperature was minus sixty degrees Fahrenheit. I was cool, but at that temperature, what do you expect?
This is the best sleeping bag I have ever owned.
The sleeping bag is bulky, but will endure a lot of punishment. The bag can open up fully and be used as a comforter if necessary. This bag will keep you warm at -40 degrees. Full review

Slumberjack Latitude -20°F

Bag lives up to its name. People who contest otherwise are not dressing appropriately (overdressing) and should find other activities than outdoor ones. This bag keeps you warm. Some writers have indicated that it is overrated. ALL bags are rated for ideal conditions and are thus overrated for some activities. ALL. Bag is comfortable, loft holds up well. NOTE: you cannot overdress and use a bag that is designed for this low of a temperature. The more you wear, the more you will actually sweat. Sweat… Full review

Western Mountaineering Bison GWS

There's nothing wrong with a little overkill when you're serious about survival. I bought this bag two years ago for dead-of-winter camping in the mountains of East Tennessee and Western North Carolina. I wanted an overkill bag and decided to go all the way. The coldest temps I'm likely to see are maybe -10° on Stratton Bald. The coldest I have actually experienced was around 0° and this bundle of joy handled that with aplomb. I'm 5'9" and bought the regular 6 ft bag. The zipper is well conceived,… Full review

The North Face Dark Star -40

If you are crazy enough to winter camp in northern Minnesota (or most places in Canada for that matter) and want an affordable extreme cold-weather bag, this one should be high on your list. Look folks, -40 degrees is cold. I mean COLD. Few of us will ever get to experience it. I came close, though. During a week-long winter camping trip to the BWCA in northern Minnesota the night temps fell to -30°F, and probably a few degrees colder. Our group had two cotton tents, neither heated at night, and… Full review

Stephenson's Warmlite Warmlite Triple Bag

Stephenson's Warmlite Triple bag is a top notch camping and backpacking sleep “system.” While an old design, it is still unique in the market, has a wonderfully comfortable mattress, and covers an extremely wide temperature range due to the dual tops design, for a price that is very attractive if you consider the alternatives. After many years, it was time to upgrade to a new sleeping bag and pad. One of my sons decided to “confiscate” my old cold weather sleeping bag and cold weather pad,… Full review

Mountain Hardwear Lamina -30

Very warm bag, comfortable down to -20°F for women I'd say. Note that it is heavier than a down bag and doesn't compress down very small. Having used this sleeping bag in a cold cabin when outside temperatures were about -25°F, I feel this bag keeps one comfortably warm down to -20°F (women), although the technical rating is for -30° (survival temp). This bag has a storage pocket on the upper body (outside of bag). It would fit a flip phone of yesteryear but not my Galaxy s4. I use it for chapstick… Full review

Big Agnes Yellow Wall SL 0°

I spend most of the year in the hills and have used this bag exclusively for the last five. After owning and using a Big Agnes bag I will not use another brand. The product is well designed. The bag has been great. I have used it for five years, everywhere from Arizona to Oregon. It is the first Big Agnes bag that I have owned and now I will not use any other maker. Big Agnes equipment is built to be used and stand up to the demands of the outdoors. I am proud of all my Big Agnes gear. Full review